build(deps): bump pycares from 4.1.2 to 4.2.0 (nspcc-dev#565)

Bumps [pycares](https://github.com/saghul/pycares) from 4.1.2 to 4.2.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/saghul/pycares/releases">pycares's
releases</a>.</em></p>
<blockquote>
<h2>4.2.0</h2>
<h2>What's Changed</h2>
<ul>
<li>dependency update to c-ares by <a
href="https://github.com/aviadhahami"><code>@​aviadhahami</code></a> in
<a
href="https://redirect.github.com/saghul/pycares/pull/170">saghul/pycares#170</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/aviadhahami"><code>@​aviadhahami</code></a>
made their first contribution in <a
href="https://redirect.github.com/saghul/pycares/pull/170">saghul/pycares#170</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/saghul/pycares/compare/pycares-4.1.2...pycares-4.2.0">https://github.com/saghul/pycares/compare/pycares-4.1.2...pycares-4.2.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/saghul/pycares/commit/7d62675aa2fcdd2a78b01a287a8ae24fe659e28b"><code>7d62675</code></a>
misc: update changelog</li>
<li><a
href="https://github.com/saghul/pycares/commit/5de60970d92b5d423c0441e8a3bfbda4ed552d17"><code>5de6097</code></a>
misc: set version to 4.2.0</li>
<li><a
href="https://github.com/saghul/pycares/commit/faab6897da7510e116f41b35a2e719d435dc28d0"><code>faab689</code></a>
tests: ignoring 2 tests due to dead servers</li>
<li><a
href="https://github.com/saghul/pycares/commit/8026e66ce7188f30020bd9a63fda020df4122117"><code>8026e66</code></a>
tests: updated google TXT records for an outdated test</li>
<li><a
href="https://github.com/saghul/pycares/commit/f4311646eede556c4db60ae3184f3a2008530246"><code>f431164</code></a>
deps: update bundled c-ares</li>
<li>See full diff in <a
href="https://github.com/saghul/pycares/compare/pycares-4.1.2...pycares-4.2.0">compare
view</a></li>
</ul>
</details>
<br />


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</details>

requirements.txt

@@ -39,7 +39,7 @@ pluggy==1.0.0
 pre-commit==2.20.0
 ptyprocess==0.7.0
 py==1.11.0
-pycares==4.1.2
+pycares==4.2.0
 pycodestyle==2.8.0
 pycparser==2.21
 pyflakes==2.4.0